Rotary cutter for woodworking-machines.



PATENTED AfiG.21,.1906.

A. W. NELSON.

RGTARY CUTTER FUR WOODWORKING MACHINES.

APPLICATION TILED OUT-26. 1905.

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To all whom; it may concern.-

Be it known that I, ARTHUR W. NELSON, a

' citizen of the United States, residing at Chicago, in the county ofCook and State .of

Illinois, have invented "certain new and useful 1m jrovernents 111Rotary Cutters for Woodwor "ng-Whtchih'es; and I do hereby declare thefollowing to be a full, clear, and enact descri tion of the invention,such as will enable oti ers skilled in the art to which it ap ertains tomake and use the same. j

y invention relates to improvements in rotary cutters forwoodworking-machines;

and its object is to provide a substantiallyline 2 2 of Fig. 1, and.Fig. 3 a detail of a modification of Fig. 2.

. Like numbers refer. to like parts in all of the figures.

1 represents a rotative cylindrical body of any convenient dimensions,in which are I formed longitudinal channels 2, the number of thesechannels being optional, according to the number of cutters to be used.

3 represents the cutters, which consist of narrow strips of steelwithout perforations, securely clamped between one wall of the roove 2and a clamping-bar t, which latter is forced against the cutter by meansof screws 5, inserted in the bar and projecting therefrom with theirheads engaging the opposite wall of the groove. The clamping-bar 4 isretained in the channel 2 by interlocking means between the bar and thebottom of the groove, consisting of a rib (S, projecting with in thegroove 2 and having a lateral tongue which engages a groove 7 in the bar4, there being sufiicient clearance between this tongue.

and groove to permit of adjusting the barby means of the screws 5. Byforming the interlockin means in the bottom of the groove the cylinderis readilyshaped by milling-cutters, and the walls at each side of thegroove Specification of Letters Patent.

Application filed October 26, 1905. Serial No. 284,516;

longitudinal channels at opposite sides, said' Patented Aug. 21, 190$.

are stronger to better stand the strain of the screws and centrifugalaction. The modification shown in Fig. v3 serves the same pur pose, islessexpensive, and consists of any convenient number of cap-screws 8inserted in the bottom of the channel 2 and rejecting within thechanneh'the heads 0. which screws are inserted in T-slots 9 in the clamping-bar, these slots being provided with suffici'ent clearance at eachside of the cap-screw to permitof adjusting the bar by means of thescrews 5. I prefer this modi led. form as being less expensive and alsopermitting the clamping member to engage the cutter 3 throughout itsentire side adjacentthereto; but either form will operatesatisfactorily.

Having thus fully'described my invention, what I claim, and desire tosecure by Letters Patent, is

l. The combination of a cylinder having a longitudinal channel, aclamping-bar adjustable in the channel, interlocking means be tween thebar and the bottom of the channel, a cutter between the bar-and one wallof the.

channel, and screws in the bar with their heads engaging the other wallof the channel. 2. The combination of a cylinder having a longitudinalchannel, cap-screws inserted in the bottom of the channel and projecting(within the same, a clamping-bar having a T- groove to receive thecap-screws, screws-in the clamping-bar and engaging one wall of thechannel, and a cutter betweenthe clamping member and the other wall ofthe channel.

3. The combination of a cylinder having channels having parallel walls,cutters consisting of narrow strips of steel having sharpened edgesprojecting outside the CiICull" ference of the said cylinder andparallel sides engaging one of the walls of the channel and one side ofthe clamping-bar, a clamping-bar in said channel and provided with aT-slot, cap-screws in the channel and. engaging the T-slot, and screwsinserted in the clampingbar, with their heads engaging the other wall ofthe channel.

' In testimony whereof I aflix my signature in presence of twowitnesses.

' ARTHUR W. NELSON. Witnesses:

LUTHER V. ltloUL'roN. GEORGIANA. Canon.

